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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. (male) pushes the testes upward toward the body for warmth or protection






2. Important 'landmark' during palpation






3. Front feet and head first. (except for hogs and dogs)






4. What helps regulate spermatogenesis?






5. (male) pushes the testes upward toward the body for warmth or protection






6. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






7. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






8. When are dairy cattle dehorned?






9. Animal which has been castrated after puberty






10. ~305 days (altough often longer due to breeding difficulties)






11. Milk ~305 days - dry 60 days prior to calving






12. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






13. 265-285 days






14. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






15. Failure to have one testis (gonad) to descend






16. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






17. Can survive ~7 days in cow. vast majority <48 hours






18. Failure to have both testis (gonads) descend






19. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






20. Parturition is controlled by...






21. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






22. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






23. What about the sperm for a bull which has been castrated but still has testicles?






24. 336 days






25. 16-20 hours






26. Why does estrus happen before ovulation?






27. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






28. ~60 days before calving






29. What helps regulate spermatogenesis?






30. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm






31. Days which have increasing daylight hours

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32. 1. brain function - 2. blood flow - 3. willing female






33. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






34. Start of the reproductive tract for the female. located outside of the body






35. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge






36. (LH) causes female's egg to break (her period)






37. Way to know everything is alright with the breeding male






38. Sperm production






39. 265-285 days






40. 114 days






41. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.






42. Depository for semen during insemination. where urine leaves the body






43. 4-6 days






44. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






45. What about the sperm for a bull which has been castrated but still has testicles?






46. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






47. Actual heat cycle (period)






48. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






49. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






50. Microscopic - make sure not sterile - very few bulls are actually tested